walter



May 12, 1931" E. c. WALTER CALCULATING MACHINE I 5 Sheets-Sheet 1 Filed June 24, 1930 0000000000 0 0%00000000 0 0 0 00000000 0 0 0000000000 0 0mw000000w m 0 000000 Q 0000000000 0 w 0000000000 0 0%00000000 0 u 0 00000000 0 Q 1 l N QN QRI H v T y 1931- E. c. WALTER CALCULATING MACHINE 5 Sheebs-Sheet 2 Filed June 24, 1930 y 1931- E. c. WALTER 1,805,060

CALCULATING MACHINE Filed June 24, 1930 5 Sheets-Sheet 3 INVENTOR ATTOR EY y 1931- E. c. WALTER 4 CALCULATING MACHINE Filed June 24, 1930 5 Sheets-Sheet 4 INVENTOR wammn ATTOR/V Y May 12, 1931. E. c. WALTER CALCULATING MACHINE I Filed June 24, 1930 5 Sheets-Sheet 5 INVENTOR dM/Ztfld Wa/ZZM, fmolmmm fy ATTOR EY Patented May 12, 1931 UNITED STATES PATENT orrlcr.

EDWARD C. WALTER, OF ORANGE, NEW JERSEY, ASSIGNOR T0 MONROE CALCULATING MACHINE COMPANY, OF ORANGE, NEW JERSEY, A CORPORATION OF DELAWARE CALCULATING MACHINE Application filed June 24,

The invention relates to calculating machines, and particularly to means for carrying the tens from the lower to the higher order numeral wheels of the register.

In calculating machines of the type under consideration, numeral wheels are mounted in a transversely shiftable carriage, and means are provided in the stationary portion of the machine for storing a carry from a numeral wheel related, in a given position of the carriage, to a differential actuator column, and for transmitting the carry impulse at a later time to the next adjacent higher order wheel. This delayed carry mechanism is provided in order that a carry impulse shall not merge with an impulse received by the higher order wheel from its difierential actuator.

In carrying the tens to numeral wheels located to the leftof the differential actuator columns, no storage devices are theoretically necessary, and machines have been built wherein delayed carry mechanism in the lower orders is combined with simultaneous carry mechanism in higher order places. This arrangement, which is illustrated in United States Patent Number 1,462,058, issued to E. F. Britten, jr., on July 17, 1923, and entitled Garry mechanism for registers, results in a diminution of the proportionate part of the operative cycle which it is necessary to allot to the carrying operation. It does not, howevt i, provide a universally applicable means for carrying the tens to any considerable number of places to the left, owing to the loading of the drive due to frictional losses, and further because of lost motion in the gearing.

The present invention, by providing a series of alternating delayed and simultaneous carry devices, reduces the load encountered at an one point in the cycle, but avoids crow ing the cycle with a great number of successive registration points. As shown the invention is utilized to secure a carry of the tens to the extreme left-hand numeral wheel, in any shifted position of the carriage. In order to keep the carr action as easy as possible, advantage may e taken of the invention disclosed in patent application Number 457,243, filed May 29, 1980, by

1930. Serial No. 463,442.

George C. Chase, and entitled Calculating machine. This mechanism operates to permit a considerable number of successive carry actions to occur, without undue crowding of the operation, by extending the carry zone beyond the normal stopping and starting position of the parts and will be referred to further hereinafter.

The invention consists in the novel construction and combination of parts, as set forth in the appended claims.

In the accompanying drawings, illustrating the invention:

Fig. 1 is a plan view of a calculating machine embodying the invention.

Fig. 2 is a diagrammatic plan view of the diflerential actuating, carry and registering devices.

Fig. 3 is a left-hand elevation of the machine, with parts broken away.

FFig. 4 is a section, taken on line 4-4 of Fig. 5 is a detail elevation of a carry setting member and contiguous parts.

Fig. 6 is a detail perspective view of the stop trigger assembly, shown in association with the extreme left-hand numeral wheel.

Fig. 7 is a detail front elevation of the carriage shifting devices, shown in a position taken during operation.

The invention is shown as applied to the structure of the Monroe calculating machine, as set forth in the patent and application above referred to, and in United States Patent Number 1,566,650, issued to George C. Chase on December 22, 1925.

Referring to the drawings, the numeral wheels 13, mounted in the transversely shiftable carriage 2, are provided each with a gear wheel adapted to mesh with an intermediate gear 12 in the stationary frame 1 of the machine. The number of intermediate gears 12 corresponds to the number of numeral wheels 13, each gear 12 in the ex treme left-hand position of the carriage 2, meshing with the gear of a numeral wheel.

The gears 12 at the right-hand side of the machine are adapted to be operated by the difierential actuator gear: 5, mounted on a drive shaft 4 and selectively set by columns of depressible keys 18 (Figs. 1, 2 and 3).

The delayed carry mechanism related to these right-hand gears 12, comprise the wellknown carry setting arms 14, mounted on a shaft 15 located in the stationary frame of the machine and having each a tooth 28 adapted for operation by a in 9 of the related numeral wheel 13. ounted on a carry shaft 73 in the stationary frame 1, are a series of arms 26 supporting sliding carry teeth 17, which teeth in the rotation. of shaft 73 are moved by cam portions of such carry setting arms 14, as have been depressed by a pin 9, into registration with the related gear 12. There are two series of these teeth 17, the teeth of each series being operable successively from right to left of the machine during rotation of shaft 73 in the appropriate direction.

In the orders to the left of the keys 18, a double series of parry teeth 17 are provided, similar to the series at the right, except that 7 they are spaced along shaft 73 so as to relate to alternate numeral wheels. Between each of these left-hand teeth 17, the carry is effected by means of gear 20, each gear-2O being fast with the intermediate car 12 related to the higher order wheel. he pin 9 of the lowerorder-wheel 13 is adapted to operate the gear 20, so that upon passage of the lower order wheel from 9 to 0 or from 0 to 9', gears 20 and 12 will immediately move the higher order gear one step.

When the mechanism disclosed in application Number 457,243 is used, the spiralsv about shaft 73 in which the series of carry teeth 17 are arranged, will intersect toward the middle of the machine, and in this case some modification of the means for restoring the left-hand carry setting arms 14 is required. In the usual arrangement, utilized in connection with the right-hand mechanism of the present disclosure, a restoring pin 16 may be mounted on arm 26 at some point between the two series of carry teeth, this pin acting to lift arm 26 and remove the cam portion thereof from the path of teeth 17. In the left-hand side mechanism, however, the setting arms 14 are depressed after the passage thereby of one of the series of teeth 17, and must remain depressed until the tooth 17 of the other series has been operated. Two pins 16 are therefore mounted on each of the left-hand arms 26, one on each side of the pair of teeth 17. This arrangement may be clearly followed in Fig. 2, wherein the point at which the passage of a lower order wheel from 9 to 0 or from 0 to 9 is indicated with relation to the carry mechanism by the sign or the sign according to the direction of r0- tation of shaft 73.

The stop controlling means of Patent 1,566,650, is modified according to the disclosure of application 457,243, so that the motor drive will be continued throughout the carry operation, unclutching and stopping means not functioning until the parts have passed some distance beyond full cycle position. According to this modification, rock arm 22 will be carried through full cycle position by link connection 21, with shaft 4, and a lug of such an arm will thereafter contact with stop element 25, if said element has been tripped. Thereafter, continued movement of arm 22-will carry therewith the stopping and unclutching arm 24, upon which the element 25 is mounted, until arm 24 contacts with fixed stop member 29.

Element 25 is tripped, as set forth in Patent 1,566,650, either by the release of the motor operation key or upon the passage of the highest order numeral wheel from 9 to 0 or from 0 to 9. The latter operation is effected in the present instance by a trigger lever 31 engagin element 25 and having a series of arms (Fig. 6), one or the other of said arms according to the position of carriage 2, lying in the path of an elongated pin 9 of the left-hand numeral wheel 13. The pins 9 of the other numeral wheels being shorter, will not operate the trigger.

Positive carry check pawls 7 are employed, such pawls being forced between the teeth of intermediate gears 12 by cam extensions 8 of the arms 26 as soon as the carry tooth has passed through the intermediate gear.

S ring checks 11 also operate upon gears 12, eing supported between each of said gears by a suitable supporting arm.

Automatic carriage shifting means are employed in the Monroe calculating machine, these means being retained without substantial change in the present structure. Because of the changed spacing of different elements of the machine, however, the em loyment of certain links is contemplated w ich are not found in the machines on the market.

Automatic carriage shifting is accomplished by setting a shifting clutch 62 into operative position, whereupon in the operation of the stopping device, arm 24 will carry a push rod 47 forwardly therewith, said rod being guided by a pin 50 of link 21 to operate a bell crank lever 52, which, by means of connection 54, will operate a shifting lever 55. Lever 55 in the present structure consists of a compound lever connected by a suitable link, one member of this lever is provided with a roller acting upon a carriage shift cam 60, the hub of which carries the clutch element 62, wherefrom the shifting impulse is transmitted to the shifting shaft 46, provided with crank pin 64 operable upon a serrated member of the carriage 2 in the well known manner (Fig. 7).

I claim:

. 1. In a calculating machine having differential value actuators and numeral wheels shiftably related thereto; carry mechanism includin a plurality of s'ettable, delayed operation levlces, a'plurality of devices 0 erable upon a numeral wheel simultaneous y with the passage of a lower order wheel to decimal position and located in' denominational orders between certain of said firstnamed devices.

2. In a calculating machine having differential value actuators and numeral wheels shiftably related thereto; carry mechanism including settable, delayed operation devices denominationally related to said actuators, higher order settable, delayed operation devices, and devices comprising direct gear connections operable upon a numeral wheel simultaneously with the passage of a lower order wheel to decimal position and located in denominational orders between said higher order settable devices.

Signed at Orange in the county of Essex and State of lfIew Jersey, this 19 day of June, A. D. 1930.

EDWARD O. WALTER. 

